FORCES 1. What is a force? A. A push or pull 2. What is a balanced force? D. A force that does not cause an object to move or change direction 3. What is an unbalanced force? D. All of the above 4. Which of the following is an example of a balanced force? A. A book sitting on a table 5. Which of the following is an example of an unbalanced force? D. All of the above 6. What happens to an object when it is acted upon by an unbalanced force? D. All of the above 7. What happens to an object when it is acted upon by a balanced force? D. None of the above 8. Which of the following is NOT a force? C. Mass 9. What is the net force on an object? A. The sum of all the forces acting on the object 10. What happens to an object when the net force on it is zero? B. It stops moving Speed, distance, time 1. What is the unit of speed? A. km/h 2. What is the unit of distance? B. km 3. What is the unit of time? C. h 4. Which of the following is the formula for speed? A. speed = distance / time 5. Which of the following is the formula for distance? C. distance = speed * time 6. Which of the following is the formula for time? B. time = distance / speed 7. If you travel for 2 hours at a speed of 50 km/h, how far do you travel? A. 100 km 8. If you travel 100 km at a speed of 50 km/h, how long does it take? B. 2 hours Distance-Time Graphs 1. What is a distance-time graph? A. A graph that shows the distance traveled over time 2. What is the slope of a distance-time graph? B. The speed 3. What is the y-axis of a distance-time graph? A. The distance traveled 4. What is the x-axis of a distance-time graph? D. Time 5. What does a straight line on a distance-time graph represent? B. An object moving at a constant speed 6. What does a curved line on a distance-time graph represent? C. An object moving at a changing speed 7. What does the slope of a distance-time graph tell us about the speed of an object? A. The steeper the slope, the faster the object is moving. 8. What does the y-intercept of a distance-time graph tell us about the starting position of an object? A. The y-intercept is the initial distance traveled. 9. Which of the following distance-time graphs represents an object at rest? A. A straight line with a slope of zero. 10. Which of the following distance-time graphs represents an object moving at a constant speed? B. A straight line with a slope of one. PRESSURE IN SOLIDS, LIQUIDS AND GASES 1. What is pressure? A. The force per unit area 2. What is the unit of pressure? A. Pascal (Pa) 3. What is the pressure at the bottom of a glass of water? A. Greater than the pressure at the top of the glass of water 4. What is the pressure in a gas? D. All of the above 5. Which of the following has the highest pressure? C. A gas 6. Why does a balloon float in the air? B. Because the pressure inside the balloon is less than the pressure outside the balloon 7. What is the hydraulic press used for? D. All of the above 8. What is the principle behind the hydraulic press? D. All of the above 9. Why does a submarine sink when it dives? A. Because the pressure of the water outside the submarine is greater than the pressure of the water inside the submarine 10. Which of the following is NOT a way to increase the pressure in a gas? C. Increase the mass of the gas